<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    var person = [{"name":"lisi", "acount":{"username":"wangwu",}},
        {"name":"xiaohong", "acount":{"username":"hong123",}},
        ]
    alert(person[0].name);
    alert(person[0].acount.username)
    alert(person[1].acount.username)
</script>
</body>
</html>